Feeding mechanism for button-hole sewing-machines



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FEEDING MECHANISM FOR BUTTON HOLE SEWINGMAGHINES.

No. 319,801. Patented June 9, 1885.

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P. DIEHL.

FEEDING MBGHANISM FORBUTTON HOLE SEWING MACHINES. No. 319,801. Patented June 9, 1885.

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ilNirEE STATES PATENT @rrrcn.

PHILIP DIEHL, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE sINeEE MANUFACTURING ooMPANY OF NEW JERSEY.

FEEDING MECHANISM FOR BUTTON-HOLE SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 319,801, dated June 9, 1885.

Application filed February 12, 1885. (No model.)

To all whom it may concern:

Be it known that I, PHILIP DIEHL, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Feeding Mechanisms for Button-Hole SewingMachines, of which the following is a specification, reference being had therein to the accompanying draw- 1ngs.

My invention relates to a feeding mechanism for' button-hole sewing-machines of that kind which is adapted to give the material the proper movements to form straight button-holes, or button-holes which do not have eyelets at one end.

AsI propose to apply my invention to sewin g-machines having laterally-moving needlebars and needles to form overedge or over-.,

seaming stitches, the only movements necessary to be imparted to the cloth-clamp in working a button-hole will be a longitudinal movement in one direction to work one side of the button-hole, a lateral movement of the clamp to bar one end of the button-hole and to bring the other side thereof beneath the needle, a reverse longitudinal movement of the clamp to work the other side of the button-hole, and a return lateral movement to bar the other end of the button-hole and to bring the parts to their first position.

My invention comprises certain mechanism for effecting these movements, which may be Varied as circumstances may require.

In the drawings, Figure l is a side elevation of a Singer sewing-machine having mechanism for moving the needle-bar laterall y,with my invention applied thereto. Fig. 2 is a detail plan view of the said mechanism for moving the needle-bar laterally. Fig. 3 is a plan view, with the bracket-arm in section, on line a b, Fig. 1. Fig. 4 is an end view of the bed-plate and attached parts, as seen from the left of Fig. 3. Fig. 5 is a bottom View of the machine with. the shuttle-operating mechanism partly broken away. Fig. 6 is a section on line :0 1, Fig. 5.

A indicates the bracket-arm of the machine, and a the horizontal driving-shaft journaled therein, and to the latter is secured a gear-wheel, a, having half the number of teeth for adjustably attaching thereto arod, a 0011- nected at its forward end to avibratory frame, a,in which the needle-bar a reciprocates vertically. The needle-bar frame a is or maybe the same in construction as the frame shown by my Patent No. 272,126, dated February 13, 1883. The needle-bar receives its vertical movements from the driving shaft a, and it will thus be readily understood that it will, be moved laterally, after each vertical movement, to form zigzag or overseaming stitches.

To the shaft a is geared a vertical shaft, b, (shown in section in Fig. 5,) this arrangement of shafts being the same as that long in use in the well known Singer family machines.

On the shaft Z), beneath the bed-plate G,will be a crank (not shown) for operating the shuttle, which may be arranged to oscillate horizontally in a race, I), the shuttle-driver receivingits movements through the arm I) and connecting-rod I) from the said crank.

As the special needle-bar and shuttle-operating mechanisms above described form no essential part of the present invention, they need not be further referred to.

To the shaft 6 is secured a cam, d, working in a yoke on a connecting-bar, D, the latter having a pin, d, adjustably secured by a clamp and thumb-screw, (P, to the slotted free end of a lever, E, pivoted on a stud, 6, attached to the bed-plate G.

F is the feeding-wheel, which is also pivoted on the stud c, said wheel being provided on its lower face with an annular flange or rib, f, and on its upper face with cam-groovesf and f To the lever E is attached a spring, 6", hearing against a cramping feed-dog, e, the latter being slotted to engage the rib f and having a tail-piece entering a recess in the lever E, as shown in Fig, 5. As theleverE is vibrated by the connecting-bar D, the feed-dog 6 will be caused to bite the rib f when moving in one Ill v a set screw, k passing through a slot, 0, in

the bed-plate, as is common with the feedregulating devices of the well-known Singer family sewing-machines. The lever G is provided at its rear end with a pin or roller working in the cam-groovef of the feed-wheel F, the forward end of said lever being loosely connected by a link, 9, to a pin, Ii, on the cloth-clamp H.

L is a sliding carrying-plate for the clothclamp, said plate being movable in ways extending lengthwise of the bed-plate O. The cloth-clamp H slides in ways extending transversely of the said plate L, the latter being connected by a link, Z, with a slotted throwover lever, M, pivoted to the bed-plateC, and

having at its free end a stud or roller working in the ca m-groovef of the wheel F. The link I is secured in the slot m of the lever M by a clamp and thumbscrew, m, similar to d, and by changing the position of the connection of said link and lever the movements of the slide L may be varied as may be required. The material in which a button-hole is to be worked being placed in the cloth-clamp, and the machine, with its laterally-moving needle-bar and needle, being set in motion, the feeding-wheel will be intermittingly rotated by the feed-dog, operated, as above described, by the cam d, through the connecting-bar D and lever E. The lever G'is vibrated to move the clothclamp lengthwise of the button-hole by reason of the above-described connections of the said lever with the camgroove f of the feeding-wheel and with the cloth-clamp. By changing the position of the pin-d in the slot of the lever E the movements of the wheel F may be varied to make the movements of the cloth-clamp faster or slower, and thus to change the distance apart of the stitches; and by varying the position of the fulcrum-block k, on which the lever G swings, the throw of said lever may be changed to give such longitudinal movements to the cloth-clamp as will correspond to any desired length of button-hole. When one side of a buttonhole has been worked, the throw-over or lateral movement of the cloth-clamp, to bring the other side of the button-hole beneath the needle, will be effected by the slide L, operated from the cam-groove f of the wheel F through the lever M and link I, as

' will be readily understood. As this throwover or lateral movement of the cloth-clamp will not occur suddenly, but will occupy the time required to form several stitches, the but- "substantially as set forth.

2. The combination, with asewing-machine having a laterally-moving needle-bar, of a carrying-plate sliding in ways extending lengthwise of the bed-plate of the machine, a

cloth-clamp movable transversely of the said carrying-plate, a feeding-wheel having camgrooves, mechanism for operating said wheel, a feeding-lever operated by said wheel and loosely connected with said cloth-clamp, and

a throw-over lever operated by said wheel and loosely connected with said carryingplate, substantially as set forth.

3. The combination, with asewing-maohine having a laterally-moving needle-bar, of a grooved feeding-wheel, its operating mechanism, a carrying-slide, a clothclainp'mounted thereon, aslotted throw-over lever pivoted to the bed-plate of the machine, and having a stud engaging a groove in said wheel, and a link pivoted to said slide and adj ustably connected to the said lever, substantially as set forth.

4. The combination, with the cloth-clamp, its carrying-slide, and the feeding-wheel, of the feeding-lever G, the connectinglink g, the fulcrum-block k, and the adjustable slide K, having an arm, 7c, substantially as set forth.

5. The combination,with the feeding-wheel, the cloth-clamp, the carrying-slide and intermediate connections between said wheel and the said clamp and slide, of the shaft b, cam d, yoked connecting-bar D, lever E, having one end slotted and its opposite end recessed, spring 6, and feed-dog 6, having a tail-piece entering the recess in the said lever, substantially as set forth.

6. The combination, withasewing-machine having a laterally-moving needle-bar, of a cloth-clamp, a carrying-slide for the same, a feeding-wheel, having grooves for operating said clamp and slide, a feeding-lever loosely connected with said clamp and having an adjustable fulcrum, a throw-over lever, a link pivoted to said slide and adjustably attached to said throw-over lever, a feed-dog, a lever for operating the same, a connecting-bar adjustably attached to the latter lever, and mech anism for operating said connecting-bar, substantially as set forth.

In testimony whereof I aifix my signature in presenceof two witnesses.

PHILIP DIEHL.

Witnesses:

JAMES REID, J OSEPH F. JAQUITI-I.

IIO 

